Socket wrench



Man. 13; 1923. 1,448,428

. 1.. J. BOWMAN SOCKET WRENCH Filed Nov. 29, 1921 5 sheets-sheet 1 Igwuentoz,

Mar. 13,1923.

L. J. BOWMAN SOCKET WRENCH Filed Nov. 29, 1921 5 sheets-sheet 2 gmnewton Mar. 13, 1923. 1,448,428

L. J. BOWMAN Y SOCKET WRENCH Filed Nov. 29, 1921 5 sheets-sheet 5 61201:new

Patented Mar. 13, 1923.

UNITED STATES LESTEB'J'. BOWMAN, 0F ELKTOIL OBEGON;

SOCKET WRENCH.

Application filed November 29, 1921. Serial No. 518,634.

To all whom it may concern Be it known that I, Lns'rnn J. BOWMAN, acitizen of the United States, residing at Elkton, in the county ofDouglas and State of Oregon, have invented a new and useful SocketWVrench, of which the following is a specification.

This invention relates to wrenches or the like, the primary object ofthe invention being to, provide a motor-driven wrench having a movablesupport to permit the wrench to be operated with facility.

Another object of the invention is to pro-.

vide a device of this character having an adjustable shank, topermit'the wrench to be employed. in various locations.

A still further object of the invention is to provide a novel form ofclutch mechanism, whereby the tool may be thrown into and out ofoperation at the will of the operator.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, may be made within thescope of what is claimed, without departing from the spirit of theinvention.

Referring to the drawings Figure 1 is a side elevational view of awrench and its support.

Figure 2 is an elevational view of the wrench and motor housing, one ofthe side walls of the motor housing being removed. Figure 3 is asectional view taken on line 33 of Figure 2.

Figure 4 is a sectional view taken on line 7 44 of Figure 2.

Figure 5 is a fragmentaldetail view of the adjustable shank. a portionthereof being broken away to illustrate the connection between thesections of the shank.

Figure 6 is a plan view of the device.

Figure 7 is a detail view partly in section, of one of the clutchelements.

Referring to the drawings in detail, the reference character 5 indicatesthe swinging support, which is formed of a pair of diverging arms 6pivotally connected to the bracket 7, as through the medium of the pin8, whereby the support may be swung in a horizontal plane, to variouspositions.

The rod 8' has its upper end anchored to a suitable supporting wall'asby means of the eye bolt 9, they opposite end of the rod havingconnection with the support 5 as through the medium of the eye bolt 10,which has connection with the support at a point adjacent to the outerend thereof.

Connecting the arms 6 at their outer ends, is a shaft 11 on which iskeyed or otherwise secured the pulley 12 over which operates theflexible supporting cable 13, which also moves over the pulley 14. Thepulley 14 is also mounted on the support 5 adjacent to the pivoted endof the support so that the weight 15 mounted at one end of thesupporting cable 13 may hang adjacent to the supporting wall, to whichthe device is secured.

On the outer end of the cable 13 is secured the wrench proper whichembodies a motor housing 16 formed preferably in sections, so that onesection may be removed to view the working parts of the wrench.

Supported within the housing 16 is a motor 17 which is in circuit with asuitable source of electric supply as through the wires 18, there beingprovided a switch member 19 by means of which the rotation of the motormay be controlled at the will of the operator. the. motor shaft, whichpinion is constantly in mesh with a gear 21 mounted on the shaft 22which operates in the bearing 23. A pinion 24 is mounted on oneend of.the

A pinion. 20 is mounted on shaft 22 and mesheswith the gear 25 carriedat one end of the shaft 26. which also carries the section 27 of theclutch mechanism. The housing is formed with an elongated bearing member28 which supports the tubular member29 forming a part of the wrenchshaft. The tubular member 29 is secured to the shaft 30, which shaftoperates in the bearing 31 and carries the movable section 32 of theclutch mechanism. A switch controlling arm 33 is pivotally supportedwithin the housing as at 34 and has one end thereof contacting with aportion of the clutch mechanism 32, whereby movement of the arm 33results in a relative movement of theclutch section 32 to move the sameinto and out of engagement with the clutch member 27 to accomplish therotation of the wrench.

Connected with the arm 33 is a clutch actuating member 35 which extendsdownwhereby the operator may conveniently move the clutch mechanism intoand out of operation. A coiled spring 36 has connection with the arm 33to normally urge the arm in a direction to disconnect the clutchsections.

Supported within the tubular member 29 is a tubular section 37 which isformed with a squared bore to accommodate the squared head 38 formed onone end of the shaft 39 that carries one section of the universal joint40. The wrench proper is of the socket type as indicated at 41, thesocket beingformed on the lower end of the rod 42 which has connectionwith the rod 39, as through the universal joint 40.

As shown more clearly by Figure 7 ot the drawing, the movable clutchmember embodies a disk-like structure formed with a plurality ofopenings to accommodate the removable containers 43, which are threadedas at as. Within each of these removable containers 4:3 is a coiledspring 45 which encircles the rod 46 that has connection with a clutchelement 4-.7, which may be formed of leather or other suitable material,the clutch elements 47 being movable within the containers, due to theconstruction as set forth.

In order that the wrench housing may be moved with "facility, a drum 48is mounted on theshaft 11 on which drum operates the cable 49, the drumbeing also secured to the shaft 11 so that when the cable is movech overthe pulley, the shaft will be rotated. to cause the wrench to be raisedand lowered.

Associated with the drum 48 is a pivoted arm 50 which carries anextension 51 provided with a brake shoe 52 on one end thereof, the brakeshoe being designed to engage one surface of the drum to hold the sameagainst movement. A coiled spring 53 has connect-ion with the arm 50 andalso has connection with the support 5 to normally urge the shoe 52towards the drum. Carried at the outer end of the arm 50 is a pulley 5%over which the cable 49 passes, so that when the cable 4-9 is p-ullechthe brake shoe 52 will be moved out of engagement with the drum 48 topermit rotation thereof for accomplishing the adjustment of the wrenchproper.

In the use of the device, the motor 17 is placed in operation, whichresults in the movement of the clutch member 27. The member 35 is nowoperated to move the movablese'ction 32 of the clutch into contact withthe clutch member 27 to impart rotary movement to the wrench proper.

From the foregoing it will be seen that due to the construction as shownand described, the wrench may be moved to various a positions toaccomplish the seating of a nut or the like, the connection between theclutch members being such that the clutch members will slip when the nutunder operation has been properly seated, thereby eliminating}; anypossibility of the nut stripping the threads of the bolt to which thenut is applied.

Having thus described the invention, what is claimed as new is Amotor-driven wrench including an adjustable support, a shaft mounted atthe outer end of the support a pulley on the shaft, a drum on the shafta brake arm carrying a brake shoe adapted to engage one end of the drumto control the movements of the drum and shaft a motor housing a cablemoving over the pulley and adapted to support the motor housing, a motorwithin the housing, a socket wrench. supported by the housing, means forconnectingthe socket wrench and motor, a flexible member wound on saiddrum andcontactingz with the brake arm. said flexible member adapted tomove the brake arm to disengage the brake shoe and drum, when saidflexible member is moved in one direction.

In testimony that I claim the foregoing as my own, I have heretoatfiized my signature in the presence of two witnesses.

LESTER J. BOWMAN.

